Double-walled vessel.



H. HENN.

DOUBLE WALLED VESSEL.

APPLICATION FILED JULY 24, 1908.

Patented June 1, 1909.

za'iieewaw $9M 1 To all whom it may concern:

warren STATEE1TENT orrron HUBERT HENN, OF BERLIN, GERMANY, ASSIGNQR TOAMERICAN THERMOS BOTTLE COliIPANY, OF BROOKLYN, NEW "YORK.

DOUBLE-WALLED VESSEL.

Specification of Letters Patent.

Patented June 1, 1909.

Application filed July 24, 1908. Serial No. 445,113.

Be it known that I, HUBERT HENN, a subject of the German Emperor, andresident of Berlin, Germany, have invented a new and useful Improvementin Double- Walled Vessels, of which the following is a specification.

The invention relates to double walled vacuum vessels of glass or otherfictile material, in which the inner and outer walls are united at themouth of the vessel and inclose between them a rarefied space.

The invention consists in the construction of the device for supportingthe inner wall on the outer wall when the vessel is tilted from avertical position or subjected to lateral shock, as more particularlypointed out in the claims.

In the accompanying drawings, Figure 1 is a view of a double walledvessel in vertical central section with two of the improved stiffeningdevices applied thereto, Fig. 2 is a section taken in the plane of theline A-A of Fig. 1, and Fig. 3 is a section taken in the plane of theline B-B of Fig. 1.

The outer wall 1 and the inner wall 2 are united with each other only atthe mouth of the vessel and they iriclose between them a rarefied space3. 30

The upper stifiening device comprises a band ring 4 snugly embracing theinner wall of the vessel, which band ring-is provided with outwardlyprojecting prongs 5 each engaging a stifiening block 6 of some suitablenon-heat-conducting material, such, for in stance, as asbestos or cork.The outer faces of these stiffening blocks 6 engage the inner face ofthe outer wall 1, for holding the inner wall spaced from the outer wallat this point. The lower stiflening device com rises a flat ring 7surrounding the inner wal and spaced from both the inner and outerwalls. This ring 7 is provided with prongs 8 uprising therefrom, each ofwhich prongs 'engagesa sti'llenin'g block 9 of some suitablenon-heatconducting material, such, for instance, as asbestos or cork.The inner faces of-these blocks 9 engage the outer face of the innerwall 2 and'the outer faces of these blocks engage the inner face of theouter wall 1 for holding the inner wall spaced from the outer Wall.vices it will be seen. that the blocks are held space,

In both of these stifiening depermanently in position by the rings sothat they can not be displaced. Furthermore, in neither of these formsdoes the ring bridge the space between the inner and outer walls.Therefore, these rings will not transmit the variations in temperaturefrom the inner wall to the outer wall.

In order to provide a more elastic support for the inner wall at thegreatest distance from the junction of the two walls at the mouth of thevessel, I arrange the lower series of stiffening blocks so that they areheld from dis lacement by frictional contact with both wa ls. "On theother hand as the upper series of blocks are located nearer the neck andat a point where the relative movement of the walls on tilting thevessel is less, I connect said blocks positively by means of the bandand prongs to the inner wall.

What I claim is 1. The combination with a double walled vesselcomprising inner and outer walls united with each other only at themouth of the vesseland inclosing between them arareiied space, of astiffening device comprising a ring surrounding the inner Wall, saidring being provided with prongs, and spacing blocks ofnon-heatconducting material engaged by said prongs whereby the blocksare held.

against displacement.

' 2. The combination with a double walled vessel comprising inner and onter Walls united with each other only at the mouth of the vessel andinolosing between them a rarefied space, of a stiffening devicecomprising a ring embracing the inner wall, said ring being providedwith outwardly extending prongs, and stiffening blocks engaging saidprongs and interposed between the ring and the outer wall for holdingouter wall.

3. The combination with a double walled vessel comprising inner andouter walls united With each other only at the mouth of the vessel andinclosing between them a rarefied of a stifiening device comprising aring surrounding the inner wall and spaced from the inner and outerwalls, said ring being provided with prongs, and stiffening blocks ofnon-heat-conducting material engaging said rongs and the inner and outerwalls for holdmg. the inner wall spaced from the outer Wall. 4. In adouble walled vaouumvessel of the the inner wall spaced from the 10blocks'of heat insulating material carried by g Y I 923,791

type set forth, a plurality of supports dis- Q said su ports and incontact with the oppoposed within the vacuum space and detach site Weably connectedto a Wall 0 said vessel, and In testimony, that I claimthe foregoing as hleeks of heat insulating material carried by myinvention, I have signed my name in pres- 5 stud supports. enceof twowitnesses, this e eventh day of 15 5'. Lu a double Walled vacuum vesselof the July 1908.

type set forth, a plurality of supports dis- HUBERT HENN. pqsed Withinthe vacuum sgmce and detach- Witnesses: ahiy co'imect'ed to a, well 0said vessel, and I'IEINRIOH RANCHHOLZ,

J HENRY HASPER.

